The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
May. 10, 2016
Applicant:
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Inventors:
Yuichi Kobayashi, Sagamihara, JP;
Kiyokazu Nakane, Ashigarakami-gun, JP;
Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D 5/18 (2006.01); C25D 3/10 (2006.01); C25D 5/14 (2006.01); C25D 17/16 (2006.01); C25D 17/00 (2006.01);
U.S. Cl.
CPC ...
C25D 5/18 (2013.01); C25D 3/10 (2013.01); C25D 5/14 (2013.01); C25D 17/007 (2013.01); C25D 17/16 (2013.01);
Abstract
According to the method for producing chromium plated parts, a plurality of workpieces are immersed in a chromium plating bath, a plating treatment is performed by using a pulse current, and chromium plating layers that have compressive residual stress and suppressed cracking are deposited on surfaces of the plurality of workpieces. A direct current from plating separation lower limit current density up to a range in which the chromium plating layers have compressive residual stress is superimposed during downtime of application of the pulse current.